ROSELAND, NJ - This week, the Essex County Environmental Centeris hosting "Little Explorers Summer Series” for children ages 4 to 6 years old. Students will take part in hands-on activities in the woods and class will be held rain or shine. A minimum number of participants is required; those interested need to register in advance by calling 973-228-8776. The event takes place on Thursday, June 25, at 1:30pm, at the Center, located at 621 Eagle Rock Avenue, Roseland.